Heather was delighted to receive the bouquet from the 'Toxic' hitmaker - whose appearance in the musical TV show aired in the US last week - and she now plans to send something to Britney in return.
Heather - who plays cheerleader Brittany Pierce in the series - said: "She sent me flowers saying, 'Good job! Love, Britney,' so I'm gonna make her something and send it to her.
"I'm not a flowers girl so I'm trying to figure out something I can do. I wanna make her a mug with our picture on it. Maybe she'll keep it."
Heather, 23, is now really excited about Gwyneth Paltrow's forthcoming appearance in 'Glee'.
She told E! News: "I read the episode and I was peeing my pants! I'm so excited."
Meanwhile, Gym Class Heroes star Travis McCoy has praised cast members Kevin McHale, Mark Salling and Chord Overstreet for their rendition of his song 'Billionaire' in the season two premiere episode.
He said: It was so impressive. The fact that they acknowledged me in that way was a really good feeling. It's such an important part of pop culture right now."
The 29-year-old musician singled out Kevin for particular praise after he perfectly executed the rap solo featured in the track.
He added to In Touch Weekly magazine: "He killed it! He was on point and everything."
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